siirtosähköjännite

Siirtosähköjännite, also known as transmission voltage, refers to the electrical voltage level used in power grids to transmit electricity over long distances. This voltage is significantly higher than the voltages used in homes and businesses, typically ranging from tens of thousands of volts to hundreds of thousands of volts. The primary reason for using high voltages is to reduce power loss during transmission. According to the physics of electrical transmission, power loss is proportional to the square of the current. By increasing the voltage, the current required to transmit the same amount of power can be significantly reduced. This reduction in current directly translates to less energy being wasted as heat in the transmission lines, making the overall power delivery system more efficient.

The process of stepping up the voltage for transmission and then stepping it down for distribution involves the use of transformers. Power plants generate electricity at a relatively lower voltage. This voltage is then increased by step-up transformers to very high siirtosähköjännite levels for efficient long-distance transport. As the electricity approaches its destination, it passes through step-down transformers at substations to reduce the voltage to levels suitable for local distribution networks. Finally, further step-down transformers are used to bring the voltage down to the standard levels used by consumers. The management and control of siirtosähköjännite are critical aspects of maintaining the stability and reliability of the electrical grid.